English U-invariant Cited by user Josephorourke on 25 Nov 2020 In mathematics, the universal invariant or u-invariant of a field describes the structure of quadratic forms over the field.
English Kaplansky's conjectures Cited by user Alex Bakharev on 29 Jul 2019 The mathematician Irving Kaplansky is notable for proposing numerous conjectures in several branches of mathematics, including a list of ten conjectures on Hopf algebras.